/**
 * Copyright (C) 2015 by Liangliang Nan (liangliang.nan@gmail.com)
 * https://3d.bk.tudelft.nl/liangliang/
 *
 * This file is part of Easy3D. If it is useful in your research/work,
 * I would be grateful if you show your appreciation by citing it:
 * ------------------------------------------------------------------
 *      Liangliang Nan.
 *      Easy3D: a lightweight, easy-to-use, and efficient C++
 *      library for processing and rendering 3D data. 2018.
 * ------------------------------------------------------------------
 * Easy3D is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 3
 * as published by the Free Software Foundation.
 *
 * Easy3D is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef EASY3D_TUTORIAL_DEPTH_IMAGE_H
#define EASY3D_TUTORIAL_DEPTH_IMAGE_H

#include <easy3d/viewer/viewer.h>


// This DepthImage class visualizes 3D models as depth images.

namespace easy3d {
    class FramebufferObject;
}


class DepthImage : public easy3d::Viewer
{
public:
    DepthImage(const std::string& title);
    
protected:
    void draw() const override;
    void cleanup() override;

    void generate_depth();
    void draw_depth() const;

private:
    easy3d::FramebufferObject*	fbo_;
};


#endif // EASY3D_TUTORIAL_DEPTH_IMAGE_H
